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IJEETC 2023 Vol.12(3): 203-208
doi: 10.18178/ijeetc.12.3.203-208

Design and Control Method of a Battery/Ultra-Capacitor Energy Storage System for EVs

Fu-Sheng Pai
Department of Electrical Engineering, National University of Tainan, Tainan, Taiwan

Manuscript received November 10, 2022; revised January 30, 2023; accepted March 25, 2023.

Abstract—This paper presents a battery/ultra-capacitor (UC) energy storage system for the operation of permanent magnet synchronous motor drives in electric vehicles (EVs). In this system, when the EV is used for accelerated operation, the battery provides a stable voltage to the inverter through the DC-DC converter. At the same time, the battery and UC jointly release energy to the inverter to share the larger current demand of the EV motor. In constant speed operation, the battery supplies energy to the inverter through a shunt diode to avoid additional power losses while the DC-DC converter is operating. During the regenerative braking mode, the current produced by the EV motor is charged to the UC to reduce pulse currents flowing into the battery, which may shorten battery life. To validate the effectiveness of the circuit design, several operation scenarios including buck and boot voltage conversion for the operation of proposed battery/UC ESS were examined in the experimental studies. Test results consolidates the feasibility and practicality of the circuit method for the EV applications.
Index Terms—Energy storage system, Lithium battery, ultra-capacitor

Cite:Fu-Sheng Pai, "Design and Control Method of a Battery/Ultra-Capacitor Energy Storage System for EVs," International Journal of Electrical and Electronic Engineering & Telecommunications, Vol. 12, No. 3, pp. 203-208, May 2023. Doi: 10.18178/ijeetc.12.3.203-208

Copyright © 2023 by the authors. This is an open access article distributed under the Creative Commons Attribution License (CC BY-NC-ND 4.0), which permits use, distribution and reproduction in any medium, provided that the article is properly cited, the use is non-commercial and no modifications or adaptations are made.